<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>事件冒泡和默认行为</title>
    <style>
        *{
            margin:0;
            padding: 0;
        }
        .father{
            width: 200px;
            height: 200px;
            background:red;
        }
        .son{
            width: 100px;
            height: 100px;
            background: blue;
        }
    </style>
    <script src="jQuery/jquery-3.4.1.js"></script>
    <script>
         $(function () {
            /*
            1.什么是事件冒泡
            2.如何阻止事件冒泡
            3.什么是默认行为
            4.如何阻止默认行为
             */
             $(".son").click(function (event) {
                alert("son");
                //return false;
                 event.stopPropagation();
             })
             $(".father").click(function () {
                alert("father");
             })
             $("a").click(function (event) {
                alert("弹出注册框");
                //return false;
                event.preventDefault();
             })
         })
    </script>
</head>
<body>
<div class="father">
    <div class="son"></div>
</div>
<a href="http://www.baidu.com">注册</a>
<form action="http://www.taobao.com">
    <input type="text">
    <input type="submit">
</form>
</body>
</html>